Pernik vs Ruse: PM2.5 compared
Pernik and Ruse were both measured on only one day over the last year, too few to compare them (it takes 30).
Right now
Pernik#1,664on the 24-hour board of 2,515, at 24 US AQI (4.4 µg/m³)
Ruse#730on the 24-hour board of 2,515, at 52 US AQI (9.5 µg/m³)
Compare either city with another
Pernik
Side by side with Sofia (the nearest), Gujranwala (the world's worst on 30 days).
Ruse
Side by side with Svishtov (the nearest), Varna (Bulgaria's 2nd worst on 30 days), Gujranwala (the world's worst on 30 days).
The same rules as every SmogRank figure: reference monitors first, and a day counts with 18 measured hours. How we measure.
Updated 2026-10-12 21:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index. Some low-cost readings: Sensor.Community, ODbL (data and licence).